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CASIOLINK archives

CASIOLINK archives are main memory archives for CASIO calculators. They usually end with the .CAS extension.

The file is a series of main memory files directly concatenated, where every file is constituted of the following:

• A header, composed of:

  • A : (0x3A) byte.

  • A header, of CAS40 or CAS50 type, including a checksum.

• Zero, one, or more data parts, depending on the header, composed of:

  • A : (0x3A) byte.

  • A contents, of the size provided by the header.

  • A checksum (1 byte).

The header format depends on the model of the calculator from or for which the file was made.

CAS40 main memory file format

This header format is used on pre-1996 calculators, and .cas files produced by these calculators. Such calculators include:

• CASIO fx-7700G (1991-1993);

• CASIO fx-9700GH (1995-1997);

• CASIO CFX-9800G (1995-1996).

See CAS40 data types for more information.

CAS50 main memory file format

This header format is used on post-1996 calculators up until 2004, excluding the AlgebraFX and compatible, and .cas files produced by these calculators. Such calculators include:

• CASIO CFX-9850G (1996-1998);

• CASIO CFX-9950G (1996-1998);

• CASIO fx-9750G (1997-1999).

See CAS50 data types for more information.